RE Audio REX6.9 6 x 9 Inches Co-Ax Kit - Set of 2 Power Handling: 200W, Nominal Rating: 100W Frequency Response: 45-20,000Hz, Efficiency: 91dB Impedance: 4 Ohm, Lowest Resonant Frequency: 70Hz, Crossover Frequency: 2,500Hz Mounting Depth: 90mm, Dimensions: 262mm x 194mm Surround: Rubber, Black Polyester Diaphragm: P.E.I.